/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/MovieRenderOverlappedImage.h
Given a rendered tile, accumulate the data to the full size image.
void AccumulatePixelData ( const [FImagePixelData](API\Runtime\ImageWriteQueue\FImagePixelData) & InPixelData, FIntPoint InTileOffset, FVector2D InSubpixelOffset, const [MoviePipeline::FTileWeight1D](API\Plugins\MovieRenderPipelineCore\FTileWeight1D) & WeightX, const [MoviePipeline::FTileWeight1D](API\Plugins\MovieRenderPipelineCore\FTileWeight1D) & WeightY )